Magnuson SC Kit Idles Like Garbage - HELP!

[anomalous]

Mine has been fine since day 1, too. Not sure what else to check other than what's already been said, but that definitely doesn't look normal. Hope you get it fixed. Keep us updated

 

[brokamonster]

Mine has been fine since day 1, too. Not sure what else to check other than what's already been said, but that definitely doesn't look normal. Hope you get it fixed. Keep us updated

Thanks! I appreciate the support!

 

[anomalous]

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Thanks! I appreciate the support!

I'll check mine after work today, but haven't noticed anything like what you're experiencing. I know how annoying having problems like this can be. Would bother the hell out of me. Reminds me of when I was having problems with downloading the tune file for Magnuson. Will see if there's anything I would check if I were having these problems

 

[rossk35]

Same here mine has no issues or makes noise at idle either I'd say from the video that the belt tensioner is bad or something else not suppose to be like that. Should replace the entire drive belt system with brand new stuff.

 

[david05111]

Unfortunately, that's their approach at the moment. After dealing with this for almost six months I told the dealer I need my money back and to take it off and suddenly both Magnuson and the dealer changed their tune. Instead of or more attempts to fix the issues they are pretending it's no longer an issue.

I've had the belt flutter since the initial installation back in September of 2019 and the dealer has had it in the shop four more times after that to work on the issue.

I said enough is enough. If it's"100% complete bolt-on system" then I said they can unbolt 100% or fix it.

They didn't like that apparently.

Have an independent shop look at it and call an attorney. The amount in question probably falls outside of small claims court.

 

[anomalous]

Out of curiousity, does the car idle rough at all ? Does it run ok ? If it idles, or runs rough, I'm wondering if a bad tune could also be the cause. Also, are you 100% positive that the parts changed were actually changed ?

 

[brokamonster]

Out of curiousity, does the car idle rough at all ? Does it run ok ? If it idles, or runs rough, I'm wondering if a bad tune could also be the cause. Also, are you 100% positive that the parts changed were actually changed ?

Good questions. The engine ran like a champ before having the Magnuson kit installed, 41K miles with all scheduled maintenance done. Even when the Magnuson belt is fluttering, the engine is quiet and the factory serpentine belt is smooth as butter. Luckily, since the entire belt drive is independent accept for the pulley piggybacking off the stock crank pulley it's pretty easy to see the issue is with the Magnuson belt drive. Everyting else on the engine idles nice a quiet like stock.

It could be the tune, it's possible. I'm told many parts were replaced but was never provided any paperwork showing all the work that was done. I can tell at least one tensioner and one belt was replaced because the new parts had different markings.

 

[brokamonster]

Have an independent shop look at it and call an attorney. The amount in question probably falls outside of small claims court.

Sadly, this is the path I'm taking since Magnuson and their dealer are now refusing to or can't resolve the issue. Either way, both Magnuson and the dealer won't reply to me anymore :noidea:

 

[boyguan]

Sadly, this is the path I'm taking since Magnuson and their dealer are now refusing to or can't resolve the issue. Either way, both Magnuson and the dealer won't reply to me anymore :noidea:

has your mechanic taken an indicator and turned the pullies to check if they are out of round?

 

[DeltaWhiskey]

could be an optical illusion, but the SC pulley looks out of round to me

 

[ax2021]

could be an optical illusion, but the SC pulley looks out of round to me

Yes. I noticed that too. On those 2 VDO’s you can see that, one SC pulley has more play, just thought it was only my illusion. It could be bad pulley, bearing or SC shaft


Sent from my iPhone using Tapatalk

 

[sammcrown]

Yes, nice and tight, no strange sounds.

 

[sammcrown]

That's the experience I expected.

So, at idle your belt is nice and smooth like the factory serpentine belt? It doesn't flap around or vibrate randomly? If you could share some video I'd love to compare.

Thanks!

Correct, nice and smooth like it should be. No strange sounds or flapping. Here's a quick video I took post installation with engine idling.
YouTube

 

[brokamonster]

has your mechanic taken an indicator and turned the pullies to check if they are out of round?

The dealer that sold me the kit has said everything is within Magnuson's specifications but would not provide the specifications or a list of what was checked when I asked.

 

[brokamonster]

Correct, nice and smooth like it should be. No strange sounds or flapping. Here's a quick video I took post installation with engine idling.
YouTube

Thanks so much for sharing this example!

 

[Jetboy]

Can you shoot another video? We need to see what's happening here:

 

[406 4runner]

It seems to me that even if there is some drag or an issue outside the belt drive system, the belt, pulley, and tensioner should still not have that amount of excess play. I would think that it would just result in a rough idle. Even if pulleys, bearings, etc are out of round or bad you should still not have that amount of slack in the belt.. Are we sure all the pulleys are the correct size diameter- is it possible that the supercharger pulley may have been for a different application and smaller?

 

[brokamonster]

Can you shoot another video? We need to see what's happening here:

I'll get some more videos showing the bypass valve. Not sure if it's working by Magnuson's specifications but it seems stable when the belts fluttering.

 

[brokamonster]

It seems to me that even if there is some drag or an issue outside the belt drive system, the belt, pulley, and tensioner should still not have that amount of excess play. I would think that it would just result in a rough idle. Even if pulleys, bearings, etc are out of round or bad you should still not have that amount of slack in the belt.. Are we sure all the pulleys are the correct size diameter- is it possible that the supercharger pulley may have been for a different application and smaller?

Magnuson nor their dealer will share any specifications.

Anyhow, I'm still working on getting my money back :violin:

 

[EddieV4runnin]

You think maybe the metal bracket where all the pulleys mount to is machined out of spec? That would be the only reason why no amount of pulleys and tensioners will fix your issue. Sometimes it’s the simplest things that cause the biggest headaches. :sadwave: